* {
    margin: 0;
    padding: 0;
}

a {
    text-decoration: none;
    color: #fff;
}

li {
    list-style: none;
}

.head {
    width: 1200px;
    height: 50px;
    margin: auto;
    padding: 20px;
    background-color: transparent;
    z-index: 10;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
}

.head .head-left {
    width: 200px;
    height: 50px;
    float: left;
}

.head .head-right {
    width: 50%;
    height: 100%;
    float: right;
    display: flex;
    justify-content: space-around;
}

.head .head-right a {
    font-size: 18px;
    padding: 10px 20px 40px;
}

.head .head-right a.active {
    color: #ff0;
    border-bottom: 2px solid #ff0;
}

footer {
    background-color: #2f3438;
    height: 80px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

footer .demo {
    width: 50%;
    margin: auto;
    display: flex;
    justify-content: space-between;

}

footer .demo .info {
    color: #747A80;
}

.right-btn {
    width: 100px;
    height: 300px;
    position: fixed;
    right: 0;
    bottom: 100px;
}

.right-btn .tip {
    width: 100%;
    height: 30%;
    border-radius: 4px;
    position: relative;
    background: url(../image/home_icon1.png) no-repeat center center/500%;
}

.right-btn .service {
    background-position: -201px -120px;
}

.right-btn .qq {
    background-position: -201px -18px;
}

.right-btn .return {
    background-position: 0px -120px;
    display: none;
}


.right-btn .tip .hide {
    width: 180px;
    height: 75px;
    background-color: #ffa631;
    position: absolute;
    top: 10px;
    left: -170px;
    color: #fff;
    text-align: center;
    line-height: 75px;
    font-size: 20px;
    border-radius: 4px;
    display: none;
}

.right-btn .tip .hide:after {
    content: '';
    display: inline-block;
    border-left: 10px solid #ffa631;
    border-top: 10px solid transparent;
    border-bottom: 10px solid transparent;
    position: absolute;
    top: 28px;
    left: 180px;
}

.right-btn .tip:hover .hide {
    display: block;
}

.right-btn .service:hover {
    background-position: -301px -120px;
}

.right-btn .qq:hover {
    background-position: -301px -18px;
}